Question 1: Fill in the blanks.
Answer: (a) ingestion, digestion, absorption, assimilation and egestion, (b) liver, (c) digestive juices, (d) villi, (e) food vacuole
Question 2: Mark T if the statement is true and F if it is false
Answer: (a) F, (b) T, (c) T, (d) T
Question 3: Tick (√) mark the correct answer in each of the following.
a. Fat is completely digested in the
Answer: (iii) Small intestine
b. Water from the undigested food is absorbed mainly in the
Answer: (iv) Large intestine
Question 4: Match the column
|Column A||Column B|
|(1) Food components||(a) Products of digestion|
|(2) Carbohydrates||(b) Fatty acid and glycerol|
|(3) Proteins||(c) Sugar|
|(4) Fats||(d) Amino acids|
Answer: (1) a, (2) c, (3) d, (4) b
Question 5: What are villi? What is their location and function?
Answer: Villi is the finger like projections. These are found in the inner walls of small intestine. It helps in absorption of the digested food.
Question 6: Where is the bile produced? Which component of the food does it digest?
Answer: Bile is produced in the liver. Bile helps in digestion of fats.
Question 7: Name the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.
Answer: Cellulose is the type of carbohydrates which is digested in ruminants but not in humans. Ruminants have a large sac –like structure between the small intestine and large intestine, in which cellulose of the food is digested by the action of certain bacteria. Such structure is not present in human. Hence human cannot digest cellulose while ruminants can.
Question 8: Why do we get instant energy from glucose?
Answer: Glucose is simple sugar so there is no need of digestion. It directly reaches the cells where it gives energy after respiration.
Question 9: Which part of the digestive canal is involved in:
Answer: (a) small intestine, (b) mouth, (c) stomach, (d) small intestine, (e) large intestine
Question 10: Match the following column
|Column I||Column II|
|(A) Salivary gland||(1) Bile juice|
|(B) Stomach||(2) Absorption of water|
|(C) Liver||(3) Saliva secretion|
|(D) Rectum||(4) Acid release|
|(E) Small intestine||(5) Release of faeces|
|(F) Large intestine||(6) Storage of undigested food|
Answer: A -3, B - 4, C- 1, D- 5, E - 2, F- 6
Question 11: Label the diagram of the digestive system.
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